diff -r 56a908924510 -r 9e7f0db6a725 src/tree.c
--- a/src/tree.c	Tue Aug 20 12:39:35 2024 +0200
+++ b/src/tree.c	Tue Aug 20 13:36:56 2024 +0200
@@ -169,8 +169,8 @@
 
     // remember a candidate for adding the data
     // also remember the exact return code from sfunc
-    void *candidate = NULL;
-    int ret_candidate = -1;
+    void *candidate = (void *) root;
+    int ret_candidate = ret;
 
     // process the working stack
     while (work_size > 0) {